The name Hyacinth in Hebrew letters is היסינת. Below: how its number adds up, which page of the Torah it falls on and what verse stands there. Everything is computed, nothing is guessed.
היסינת
In short
Your name in Hebrew letters is היסינת. Hyacinth is the English form of the Greek name Hyakinthos. In Greek myth he was a young man from whose blood the hyacinth flower grew, and the flower still has his name. In Hebrew it is written by sound. Adding up the numbers of its letters gives 535 — the same as the Torah word כהנתכם, “your priesthood”. That number points to Torah page 181 of 354 — in the portion Shmini. What that portion is about: The eighth day: Aaron's first service; fire from heaven; the death of Nadab and Abihu; clean and unclean animals. The verse that begins with the first letter of your name and ends with the last is Genesis 20:5. Each of these steps is laid out below with its sources. Every figure can be checked by hand.
You wrote “Hyacinth” — this exact spelling is what was calculated: היסינת. A name from the Tanakh — its Tanakh spelling is used. If your name is spelled differently, correct the Hebrew spelling and the report is recomputed.
Adding up the letters of the name היסינת gives 535.
535
The number 535 is the Torah word כהנתכם — «your priesthood» (Numbers 18:1).
And the breast of waving and the thigh of heaving shall ye eat in a clean place; thou, and thy sons, and thy daughters with thee; for they are given as thy due, and thy sons' due, out of the sacrifices of the peace-offerings of the children of Israel.
This is from the portion Shmini. What it is about: The eighth day: Aaron's first service; fire from heaven; the death of Nadab and Abihu; clean and unclean animals.
Other ways of counting
The tradition counts the same name in several ways. The main one is above: each letter is its number. The other eight are old and checkable too; each gives its own number, and many of them have a Torah word with the same number.
Final letters as 500–900 (mispar gadol) — 535. A Torah word with the same number is כהנתכם — “your priesthood” (Numbers 18:1).
Reduced, each letter to one digit (mispar katan) — 22. A Torah word with the same number is יחד — “together” (Genesis 13:6).
Ordinal: alef 1, bet 2 … tav 22 (mispar siduri) — 76. A Torah word with the same number is עבד — “servant” (Genesis 9:25).
Cumulative: a letter plus all letters before it (mispar kidmi) — 2070.
Squares of the letter values (mispar perati) — 166325.
Building: the sum grows with each letter (mispar bone’eh) — 850. A Torah word with the same number is תכלת — “blue wool” (Exodus 25:4).
The letters that come out are צמחמטא — not a word that stands in the Pentateuch. Atbash: letters mirrored, alef for tav, bet for shin, and the number of the resulting word — 188. A Torah word with the same number is פקח — “to open” (Genesis 3:5).
Filling: the names of the letters are counted — alef, bet, gimel… (milui) — 678. A Torah word with the same number is מרכבתיו — “his chariots” (Exodus 14:25).
The number 535 appears in the classical books 1 time across 1 work. The earliest mention is ציצים ופרחים (יעב"ץ) (~1750).
Every letter of the name explained, the words and namesakes with references, the Hebrew date, the letter and tribe of the month, day 861 of your life (±1), the psalm by age, the attestations from the classical books — a PDF sent to your email.
The number of the day, every morning
Every date has a number too. Once a year it will match the number of your name — 535. The channel posts one number a day, one verse and the Torah page it lands on. Nothing after it, no mailing list.
Hebrew is written from right to left. היסינת has 6 letters: ה He, י Yod, ס Samekh, י Yod, נ Nun, ת Tav. The first letter is He, the last is Tav.
For an engraving, a sign or a tattoo, show the spelling to someone who reads Hebrew: transliterating a name is a choice, not the only option.
The name היסינת does not stand as a word in the Pentateuch — as with most names, including many Tanakh names from the later books.
The verse of your name
There is a custom: at the end of the prayer one says a Torah verse that begins with the first letter of one's name and ends with its last. For היסינת these are ה and ת. The Pentateuch has 4 such verses. The first of them is Genesis 20:5:
הלא הוא אמר לי אחתי הוא והיא גם הוא אמרה אחי הוא בתם לבבי ובנקין כפי עשיתי זאת
This is from the portion Vayera. What it is about: Three visitors at Abraham's tent; the plea for Sodom; the birth of Isaac; the binding of Isaac on Mount Moriah.
The name היסינת has no such day. The numbers of the dates in a year cover 326 values out of 940, and 535 is not among them. Half of all names are like this — neither good nor bad, just a fact of counting.
Add a date of birth and the verse of meeting from that week's portion is added to the reading.
Each Hebrew letter has a number; a word's number is their sum (alef 1 … tav 400). The page is the remainder modulo 354: the Torah divided into 354 pages of 861 letters, as the lunar year has 354 days. Everything can be checked by hand.